首页|MAPPING ALTERATION ZONES IN INACCESSIBLE REGIONS USING TARGET DETECTION ALGORITHMS TO SWIR BANDS OF ASTER REMOTE SENSING DATA
MAPPING ALTERATION ZONES IN INACCESSIBLE REGIONS USING TARGET DETECTION ALGORITHMS TO SWIR BANDS OF ASTER REMOTE SENSING DATA
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In this study， the application of shortwave infrared (SWIR) bands of Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data was investigated to extract geological information for alteration mineral mapping in inaccessible regions。 The Oscar II coast area in the north-eastern Graham Land， Antarctic Peninsula (AP) was selected for this study to conduct a satellite-based remote sensing mapping technique。 Target detection algorithms such as Constrained Energy Minimization (CEM)， Orthogonal Subspace Projection (OSP) and Adaptive Coherence Estimator (ACE) were tested to ASTER shortwave infrared bands for detecting spectral features attributed to alteration mineral assemblages at district scale。 Sub-pixels abundance of spectral features related to Al-O-H， Fe， Mg-O-H and CO3 mineral groups were detected using SWIR datasets of ASTER with little available geological data for poorly mapped regions and/or without prior geological information for unmapped regions in northern and southern sectors of Oscar II coast area， Graham Land。 Fractional abundance of alteration minerals such as muscovite， kaolinite， illite， montmorillonite， epidote， chlorite and biotite were identified in alteration zones using CEM， OSP and ACE algorithms in poorly mapped and unmapped terrains at district scale。 The results of this investigation demonstrated the applicability of SWIR bands of ASTER spectral data for alteration mineral mapping in inaccessible regions， particularly using the image processing algorithms that are capable to detect sub-pixel targets in the remotely sensed images， where no prior information is available。
ASTERSWIRGeological mappingAntarctic environments
Amin Beiranvand Pour、Mazlan Hashim、Yongcheol Park、Jong Kuk Hong
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Geoscience and Digital Earth Centre (INSTeG),Universiti Teknologi Malaysia, 81310 UTM JB, Malaysia,Korea Polar Research Institute (KOPRI), Songdomirae-ro,Yeonsu-gu, Incheon 21990, Republic of Korea
Geoscience and Digital Earth Centre (INSTeG),Universiti Teknologi Malaysia, 81310 UTM JB, Malaysia
Korea Polar Research Institute (KOPRI), Songdomirae-ro,Yeonsu-gu, Incheon 21990, Republic of Korea
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